The study is evidence that there is a systemic disadvantage for non whites when hiring.

Why should this not be the case at NASA? What makes NASA so special that findings, that showed true on a systemic level across six countries don't apply to it?

If you are interested, NASA did an audit on their progress on including DEIA in 2023.

https://oig.nasa.gov/wp-content/uploads/2024/02/IG-23-011.pdf

Despite support from Agency leaders and multiple initiatives to increase diversity, we found NASA has made little progress in increasing the representation of women and minorities in its civilian workforce or leadership ranks. Specifically, over the past decade NASA’s overall workforce demographics have stayed roughly the same, with small increases (1 or 2 percent) for some groups. Demographics have not varied significantly over the same time period at individual NASA Centers, with only two Centers increasing African American representation and other Centers making small gains in Hispanic, Asian American, and women’s representation. We also found NASA has made few gains in the percentages of women and racial and ethnic minorities in its senior levels (General Schedule 14 and 15 positions and NASA’s Efforts to Increase Diversity in Its Workforce RESULTS IN BRIEF Senior Executive Service) over the decade. At the same time, the proportion of veterans NASA hires has declined over the past 10 years, most significantly from 28 percent in 2015 to 13 percent in 2021